Dragons and tigers roost - Nanjing City History Exhibition Introduction: The exhibition uses the cultural relics in the museum collection and local Nanjing documents and materials, and according to the context of historical development, it is divided into five units from ancient times to the Qin and Han Dynasties, the Six Dynasties, the Sui, Tang, Song and Yuan Dynasties, the Ming and Qing Dynasties, and the Republic of China. , comprehensively presents the history and culture of Nanjing with its outstanding people and profound cultural heritage, focusing on the major events and important figures in the history of Nanjing.